docs: def areasAndLengths(self,
                          polygons,
                          lengthUnit,
                          areaUnit,
                          calculationType,
                          ):
          """
             The areasAndLengths operation is performed on a geometry service
             resource. This operation calculates areas and perimeter lengths
             for each polygon specified in the input array.
  
             Inputs:
                polygons - The array of polygons whose areas and lengths are
                           to be computed.
                lengthUnit - The length unit in which the perimeters of
                             polygons will be calculated. If calculationType
                             is planar, then lengthUnit can be any esriUnits
                             constant. If lengthUnit is not specified, the
                             units are derived from sr. If calculationType is
                             not planar, then lengthUnit must be a linear
                             esriUnits constant, such as esriSRUnit_Meter or
                             esriSRUnit_SurveyMile. If lengthUnit is not
                             specified, the units are meters. For a list of
                             valid units, see esriSRUnitType Constants and
                             esriSRUnit2Type Constant.
                areaUnit - The area unit in which areas of polygons will be
                           calculated. If calculationType is planar, then
                           areaUnit can be any esriUnits constant. If
                           areaUnit is not specified, the units are derived
                           from sr. If calculationType is not planar, then
                           areaUnit must be a linear esriUnits constant such
                           as esriSRUnit_Meter or esriSRUnit_SurveyMile. If
                           areaUnit is not specified, then the units are
                           meters. For a list of valid units, see
                           esriSRUnitType Constants and esriSRUnit2Type
                           constant.
                           The list of valid esriAreaUnits constants include,
                           esriSquareInches | esriSquareFeet |
                           esriSquareYards | esriAcres | esriSquareMiles |
                           esriSquareMillimeters | esriSquareCentimeters |
                           esriSquareDecimeters | esriSquareMeters | esriAres
                           | esriHectares | esriSquareKilometers.
                calculationType -  The type defined for the area and length
                                   calculation of the input geometries. The
                                   type can be one of the following values:
                                   planar - Planar measurements use 2D
                                            Euclidean distance to calculate
                                            area and length. Th- should
                                            only be used if the area or
                                            length needs to be calculated in
                                            the given spatial reference.
                                            Otherwise, use preserveShape.
                                   geodesic - Use this type if you want to
                                            calculate an area or length using
                                            only the vertices of the polygon
                                            and define the lines between the
                                            points as geodesic segments
                                            independent of the actual shape
                                            of the polygon. A geodesic
                                            segment is the shortest path
                                            between two points on an ellipsoid.
                                   preserveShape - This type calculates the
                                            area or length of the geometry on
                                            the surface of the Earth
                                            ellipsoid. The shape of the
                                            geometry in its coordinate system
                                            is preserved.
             Output:
                JSON as dictionary
          """
          url = self._url + "/areasAndLengths"
          params = {
              "f" : "json",
              "lengthUnit" : lengthUnit,
              "areaUnit" : {"areaUnit" : areaUnit},
              "calculationType" : calculationType
          }
          if isinstance(polygons, list) and len(polygons) > 0:
              p = polygons[0]
              if isinstance(p, Polygon):
                  params['sr'] = p.spatialReference['wkid']
                  params['polygons'] = [poly.asDictionary for poly in polygons]
              del p
          else:
              return "No polygons provided, please submit a list of polygon geometries"
          return self._get(url=url, param_dict=params,
                              securityHandler=self._securityHandler,
                              proxy_url=self._proxy_url,
                             proxy_port=self._proxy_port)